Bed-plate for sewing-machines



2 Sheets-Sheet 1.

No Model.)

L. MUTHER. BED PLATE FOR SBWIFG'MAGHIN S. I N0. 523,917. Patented July31, 1894.

mu-may {No Model.) 2 Sheets- Sheet 2.

L. MUTHER.

BED PLATE FOR SEWINGMAGHINES.

No. 523,917. Patented July 31, 1894.

' UNITED STATES PATENT OFFICE.

LORENZMUTHER, OF OAK PARK, ssIeNOR TO THE UNION sPEoIALI sEWINe MAOHINECOMPANY, OF CHICAGO, ILLINOIS.

BED-PLATE FOR SEVtI ING-MACHINES.

SPEpIFIGATQON forming part of Letters Patent No. 523,917, dated July31,1894.

Application filed October 1893.

To all whom it may concern: 5

Be it known that I, LORENZ MUTHER, a citizen of the United States,residing at Oak Park,

inthe county of Cook, State of Illinois, have invented certain new anduseful Improvements in Sewing-Machines, of which the following is adescription, reference being had to the accompanying drawings, and tothe let' be converted intoa flatbed machine and used for ordinary work.

The invention, therefore, consists in the matters hereinafter describedand referred to in the appended claims.

In the accompanying drawings which illustrate my invention, Figure 1 isa perspective View showing the Union special cylinder vamping machinewith my attachment applied. Fig. 2 is an end View partly in section ofmy present invention, and Fig.3 is a similar side View.

In the drawingsArepresents the standard of the ordinary Union specialcylinder Vamp ing sewing machine, B the overhanging arm or gooseneck,and O the needle lever. The needle bar, presser-foot, guide-foot,needles, &c., are all of ordinary and-well known construction and neednot be herein specifically referred to.

D represents the cylindrical bed of the machine having the curved throatplate a and the tapering hinged end cap 1) through which access isgained to the end of the machine. This cylindrical bed D is a casingwithin which is supported the looper, looper rock shaft, looper rockerarm, feeding mechanism, main shaft and take up, and it is provided witha removable top plate 0 through which access is bad tothe machinefor'threading the looper, adjusting the throw of the feed bars and thelike.

In providing an attachment such as mine,

Serial No. 487,379. (No model.)

converted into a flat bed machine it is desirable so to construct theplate that although to; all intents and purposes the cloth plate will beflat yet there must beready access to thelo'oper and feeding mechanismand this too without necessitating the expenditure of time sufficient toremove the entire attachment, and it will be noticed hereinafter thatthisobject is accomplished by my device. This attachment is formed inthe shape in Outline Of the ordinary bed plate of the. ma-

chine and consistsof a fiat rectangular plate E provided with alongitudinal slot F to fit over the upper portion of the cylindrical bedplate as shown in Fig. 1, it being slid into position longitudinally. Tothe under side'of the plate E is secured by means of screws d (shown inFig. 2) the yoke e'curved to conform to the shape of the cylinder whichlatter passes through the yoke, a set screw f passing through the bottompart of the yoke up into the under side of the cylinder thereby securingthe fiat bed plate in proper position, the sides and outer end of theslot resting upon and partly inclosing the top part of the cylinder, andin'order to insure the more even rest-ing of the plate I preferably formit with a slight tapering bulge g to conform to the shape of the end capof the'cylinder.

As hereinafter stated the longitudinal slot in the flat plate isnarrower than the transverse diameter of the cylinder,bein'g of widthsufficient -tO allow the throat plate to project through and to allowfree action of. the feed dogs,:&c. Hence said plate partially covers thecylinder, and in order to provide an easy entrance to the looper andfeeding mechanism thepart E of the fiat plate is hinged so that,although when in positionfor use it paradvantage in my machine for inorder to 1 thread the'looper, &;c., it is not necessary to remove theattachment. This hinged part E has a web G extending downwardly from itsunder side on the end of which is a sleeve h rigidly secured to a pivotbolt or shaft H which passes through and is free to turn in a sleeve '5fixed to the yoke. Upon the other end of the shaft a collar I issecured.

A lug 70 attached to the web Gr has secured to it a plate spring K thelower end of which rides upon the inclined cam Z on the sleeved wherebythe spring holds the cover E. in either open or closed position.

Having thus described my invention, what I claim as new, and desire tosecure byLetters Patent, is

1. In a sewing machine having a cylindrical casing forming the bedplate, and inclos- 'ing certain of the working parts, a supplementarywork plate supported bysaid casing and removably secured thereto, andhaving-a hinged section adapted to be swung back to expose the casingwithout removing the entire, plate, substantially as described 2. In:combination with asewing machine having acylindrical bed plate, aflatbed plate; having. alongitudinal slotadapted to fitupon the;cylindeaithe sides of said slot embracing the cylinder, and alyokesupported from the flat bed plate and adapted to receive the cylinder,with means for securing the cylinder and yoket-ogether; substantiallyasdescribed.

3. In. combination with a sewing machine having a cylindrical bed andaremovable top plate therefor, a flatbed plate removably se- 1 cured tosaid cylinder, and having a hinged portion verting a cylinder sewingmachine intoa fiat bed machine comprising a plate, a yoke secured to theundersidethereofi and", provided wi'th a screw to pass into theunderside of the cylinder, a sleeve; attached; to one sideof YY saidyoke, and having a cam therecma shaft passing? through said sleewe-, anda hinged portionofthe plateprovided with'asleevelflecured to theshaftand; having a'springadapted to ride on theicam substantially asdescribed. In testimony whereof I afIi-x my signaturein presence of twowitnesses.

LORENZ MU'FIIER'.

Witnesses:

CHESTER MGNEIL, W. P. News.

